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A major rewrite of interrupt handling for incoming mailbox processing, to split the timing critical steps from the the deferrable steps as the sending XPU on the CX23418 will time out and overwrite our incoming mailboxes rather quickly. Setup a pool of work "order forms" for the irq handler to send jobs to the new work handler routine which uses the kernel default work queue to do the deferrable work. Started optimizing some of the cx18-io calls as they are now the low hanging fruit for recoving microseconds back from the timeline. Future optimizations will get rid of mmio read retries, mmio stats logging, and combine smaller functions in the irq path into the larger ones to save ~2 us each. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
35 lines
1.3 KiB
C
35 lines
1.3 KiB
C
/*
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* cx18 interrupt handling
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*/
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#define HW2_I2C1_INT (1 << 22)
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#define HW2_I2C2_INT (1 << 23)
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#define HW2_INT_CLR_STATUS 0xc730c4
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#define HW2_INT_MASK5_PCI 0xc730e4
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#define SW1_INT_SET 0xc73100
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#define SW1_INT_STATUS 0xc73104
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#define SW1_INT_ENABLE_PCI 0xc7311c
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#define SW2_INT_SET 0xc73140
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#define SW2_INT_STATUS 0xc73144
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#define SW2_INT_ENABLE_CPU 0xc73158
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#define SW2_INT_ENABLE_PCI 0xc7315c
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irqreturn_t cx18_irq_handler(int irq, void *dev_id);
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